MESON Chess Problem Database
Problem Display
PID: 222359 (5q1B/8/p1PNBnQ1/2n1p2R/2Nk3r/KpR5/1P1P2b1/8 w - - 0 1)
Jonsson, Nils Gustav Helmer
Suomen Shakki, 1952
#2
11 + 9
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Re4
- 2.Sf5#
- 1...Bf1
- 2.Qg1#
- 1...Bh1
- 2.Qg1#
- 1...Bf3
- 2.Qg1#
- 1...Bh3
- 2.Qg1#
- 1...Be4
- 2.Qg1#
- 1...Bd5
- 2.Qg1#
- 1...Bxc6
- 2.Qg1#
- 1...Se4
- 2.Bxe5#
- 1...Sd5
- 2.Bxe5#
- 1...Sxh5
- 2.Bxe5#
- 1...Sh7
- 2.Bxe5#
- 1...Se8
- 2.Bxe5#
- 1...Sg8
- 2.Bxe5#
- 1...e4
- 2.Sf5#
- 2.Rd5#
- 1...a5
- 2.Sb5#
- 1...Re4
- Tries
- 1.Se3?
- threat
- 2.Sef5#
- 2.Rc4#
- 1...Qxd6
- 2.Rc4#
- 1...Rxh5
- 2.Rc4#
- 1...Sxe6
- 2.Rc4#
- 2.Qd3#
- 1...Sxh5
- 2.Rc4#
- 1...Re4
- 2.Sef5#
- 2.Sdf5#
- 1...Rf4
- 2.Rc4#
- 1...Bf1
- 2.Sef5#
- 1...Bh3
- 2.Rc4#
- 1...Bd5
- 2.Sef5#
- 1...Sce4
- 2.Sf5#
- 1...Sfe4
- 2.Bxe5#
- 1...Sg4
- 2.Rc4#
- 1...Sd5
- 2.Bxe5#
- 2.Rc4#
- 1...Sfd7
- 2.Rc4#
- 1...Sh7
- 2.Bxe5#
- 2.Rc4#
- 1...Se8
- 2.Bxe5#
- 2.Rc4#
- 1...Sg8
- 2.Bxe5#
- 2.Rc4#
- 1...e4
- 2.Rd5#
- 1...Be4!
- threat
- 1.Sxe5?
- threat
- 2.Rc4#
- 1...Sxe6
- 2.Qd3#
- 1...Bf1
- 2.Sf3#
- 2.Qg1#
- 1...Bd5
- 2.Qg1#
- 1...Rxh5!
- threat
- 1.Sb6?
- threat
- 2.Rc4#
- 1...Re4
- 2.Sf5#
- 1...Bf1
- 2.Qg1#
- 1...Be4
- 2.Qg1#
- 1...Bd5
- 2.Qg1#
- 1...Sfe4
- 2.Bxe5#
- 1...e4
- 2.Rd5#
- 1...Sce4!
- threat
- 1.Rxh4+?
- 1...Be4
- 2.Sf5#
- 2.Qg1#
- 1...Sfe4
- 2.Bxe5#
- 1...Sg4
- 2.Bxe5#
- 1...e4
- 2.Sf5#
- 1...Sce4!
- 1...Be4
- 1.Qg3?
- threat
- 2.Qf2#
- 2.Qxe5#
- 2.Qe3#
- 1...Qxd6
- 2.Qe3#
- 1...Rxh5
- 2.Qf2#
- 2.Qe3#
- 1...Sxe6
- 2.Qxe5#
- 1...Sxh5
- 2.Bxe5#
- 2.Qxe5#
- 2.Qe3#
- 1...Sd3
- 2.Qe3#
- 1...Sce4
- 2.Qxe5#
- 2.Qe3#
- 1...Scd7
- 2.Qf2#
- 2.Qe3#
- 1...Qh6
- 2.Qxe5#
- 1...Rh3
- 2.Qxe5#
- 1...Re4
- 2.Sf5#
- 1...Rf4
- 2.Qe3#
- 1...Bf3
- 2.Qf2#
- 2.Qxe5#
- 2.Qg1#
- 1...Sfe4
- 2.Bxe5#
- 2.Qxe5#
- 2.Qe3#
- 1...Sd5
- 2.Bxe5#
- 2.Qxe5#
- 1...Sfd7
- 2.Qe3#
- 1...Sh7
- 2.Bxe5#
- 2.Qxe5#
- 2.Qe3#
- 1...Se8
- 2.Bxe5#
- 2.Qxe5#
- 2.Qe3#
- 1...Sg8
- 2.Bxe5#
- 2.Qxe5#
- 2.Qe3#
- 1...e4
- 2.Sf5#
- 2.Rd5#
- 2.Qe5#
- 2.Qe3#
- 1...Sg4!
- threat
- 1.Qg5?
- threat
- 2.Qe3#
- 2.Qxe5#
- 1...Qxd6
- 2.Qe3#
- 1...Rxh5
- 2.Qe3#
- 1...Sxe6
- 2.Qxe5#
- 1...Sd3
- 2.Qe3#
- 1...Scd7
- 2.Qe3#
- 1...Qh6
- 2.Qxe5#
- 1...Rh3
- 2.Qxe5#
- 1...Re4
- 2.Sf5#
- 1...Rf4
- 2.Qxe5#
- 1...Sd5
- 2.Bxe5#
- 2.Qxe5#
- 1...Sfd7
- 2.Qe3#
- 1...e4
- 2.Sf5#
- 2.Qe3#
- 2.Qxc5#
- 2.Qd5#
- 2.Qe5#
- 1...Sg4!
- threat
- 1.Se3?
- Keys
- 1.Sa5!
- threat
- 2.Rc4#
- 1...Sxe6
- 2.Qd3#
- 1...Re4
- 2.Sf5#
- 1...Bf1
- 2.Qg1#
- 1...Be4
- 2.Qg1#
- 1...Bd5
- 2.Qg1#
- 1...Sce4
- 2.Sxb3#
- 1...Sfe4
- 2.Bxe5#
- 1...e4
- 2.Rd5#
- threat
- 1.Sa5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 10
- Sets
- R(d);SBLOCK::S(H)
- B(a);OGATE::QAB(J)
- B(a);OGATE,XP(G)::QAB(J)
- S(h);OGATE,P_SPINP(f)::B(K),XP(f)
- S(h);OGATE,P_SPINP(f),XR(F)::B(K),XP(f)
- P(g);N_GUARD::S(H)
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(i);XS(H)::R1(D)
- R(d);XR(F)::R1(D)
- S(h);P_SPINP(f),XR(F)::R1(D)
- R(d);::R1(D)
- B(a);::S(E)
- B(a);::R1(D)
- S(e);P_PINS(H)::S(E)
- S(h);OGATE,P_SPINP(f)::B(K),XP(f)
- S(h);P_SPINP(f)::R1(D)
- P(f);OGATE,P_SPINS(h)::R1(F)
- Refutation
- B(a);
- Try
- S(E);XP(f)
- Threat
- R1(D)
- Vars
- S(e);N_GUARD,P_PINS(H),XB(I)::QAR1(J)
- B(a);OGATE::QAB(J)
- Refutation
- R(d);XR(F)
- Try
- S(E);
- Threat
- R1(D)
- Vars
- R(d);SBLOCK::S(H)
- B(a);OGATE::QAB(J)
- S(h);OGATE,P_SPINP(f)::B(K),XP(f)
- P(f);OGATE,P_SPINS(h)::R1(F)
- Refutation
- S(e);P_PINS(H)
- Try
- R(F);CHECK,XR(d)
- Vars
- S(h);OGATE,P_SPINP(f),P_SPINS(h)::B(K),XP(f)
- P(f);P_SPINP(f),P_SPINS(h)::S(H)
- Refutation
- S(e);P_PINS(H),P_SPINS(e)
- Try
- Q(J);
- Threat
- DUALS(3)
- Vars
- Q(i);XS(H)::QAB1(J)
- S(e);P_PINS(H),XB(I)::QAB1(J),XP(f)
- S(e);P_PINS(H)::QAB1(J)
- Q(i);::QAB1(J),XP(f)
- R(d);::QAB1(J),XP(f)
- R(d);SBLOCK::S(H)
- R(d);::QAB1(J)
- S(h);P_SPINP(f)::QAB1(J)
- Refutation
- S(h);P_SPINP(f)
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- Q(i);XS(H)::QAB1(J)
- R(d);XR(F)::QAB1(J)
- S(e);P_PINS(H),XB(I)::QAB1(J),XP(f)
- S(e);P_PINS(H)::QAB1(J)
- Q(i);::QAB1(J),XP(f)
- R(d);::QAB1(J),XP(f)
- R(d);SBLOCK::S(H)
- S(h);P_SPINP(f)::QAB1(J)
- Refutation
- S(h);P_SPINP(f)
- Try
- Actual
- S(E);
- Threat
- R1(D)
- Vars
- S(e);N_GUARD,P_PINS(H),XB(I)::QAR1(J)
- R(d);SBLOCK::S(H)
- B(a);OGATE::QAB(J)
- S(e);N_GUARD,P_PINS(H)::S(E),XP(b)
- S(h);OGATE,P_SPINP(f)::B(K),XP(f)
- P(f);OGATE,P_SPINS(h)::R1(F)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).